The Lost Hotel has two entrances: one on Route 15 and another on Route 16. Each entrance accesses its own area that doesn't connect to the other. You can find a wide assortment of items in the shaking trash cans. On Tuesdays, wild Rotom can be found in certain trash cans as well.

Route 15 Entrance:
This stretch of hallway has two punks and a Smoke Ball.

A Punk Guy is guarding the last area and says something about you not having a sense of style. This means you need to learn all of the skate tricks found in Lumiose City. To do this, find all of the Roller Skaters who teach these tricks. They are located in South Boulevard, North Boulevard, Vert Plaza, and Estivel Avenue. Once you have all of the skating tricks, the Punk Guy will let you pass and meet the "Twirling Whirlwind" to learn the final trick, the Cosmic Flip.

A Dread Plate is behind one of the smashable walls. The Roller Skater gives TM 56 Fling, which throws a held item at the target. The damage dealt by Fling depends on the item thrown. Walk north to battle another Punk Guy.